#ifndef _CH343_H
#define _CH343_H

/*
 * Baud rate and default timeout
 */
#define DEFAULT_BAUD_RATE 9600
#define DEFAULT_TIMEOUT   2000

/* Internal flags used only by kernel */
#define ASYNCB_INITIALIZED        31 /* Serial port was initialized */
#define ASYNCB_SUSPENDED        30 /* Serial port is suspended */
#define ASYNCB_NORMAL_ACTIVE        29 /* Normal device is active */
#define ASYNCB_BOOT_AUTOCONF        28 /* Autoconfigure port on bootup */
#define ASYNCB_CLOSING                27 /* Serial port is closing */
#define ASYNCB_CTS_FLOW                26 /* Do CTS flow control */
#define ASYNCB_CHECK_CD                25 /* i.e., CLOCAL */
#define ASYNCB_SHARE_IRQ        24 /* for multifunction cards, no longer used */
#define ASYNCB_CONS_FLOW        23 /* flow control for console  */
#define ASYNCB_BOOT_ONLYMCA        22 /* Probe only if MCA bus */
#define ASYNCB_FIRST_KERNEL        22

/*
 * CMSPAR, some architectures can't have space and mark parity.
 */

#ifndef CMSPAR
#define CMSPAR			0
#endif

/*
 * Major and minor numbers.
 */

#define CH343_TTY_MAJOR		170
#define CH343_TTY_MINORS	256

/*
 * Requests.
 */

#define USB_RT_CH343		(USB_TYPE_CLASS | USB_RECIP_INTERFACE)

#define CMD_R			0x95
#define CMD_W			0x9A
#define CMD_C1			0xA1
#define CMD_C2			0xA4
#define CMD_C3			0x05
#define CMD_C4			0xA8
#define CMD_C5			0x5E
#define CMD_C6			0x5F
#define CMD_C7			0xAA
#define CMD_C8			0xAC
#define CMD_C9			0xAB
#define CMD_C10			0xA9
#define CMD_C11			0xAD


#define CH343_CTO_O		0x10
#define CH343_CTO_D		0x20
#define	CH343_CTO_R		0x40
#define	CH343_CTO_A		0x80
#define CH343_CTI_C		0x01
#define CH343_CTI_DS	0x02
#define CH343_CTI_R		0x04
#define CH343_CTI_DC	0x08
#define CH343_CTI_ST 	0x0f

#define CH343_CTT_M		0x08
#define CH343_CTT_F 	0x44
#define CH343_CTT_P  	0x04
#define CH343_CTT_O 	0x02

#define CH343_LO		0x02
#define CH343_LE		0x04
#define CH343_LB
#define CH343_LP		0x00
#define CH343_LF		0x40
#define CH343_LM		0x08

#define CH343_L_R_CT	0x80
#define CH343_L_R_CL	0x04
#define CH343_L_R_T	    0x08

#define CH343_L_E_R		0x80
#define CH343_L_E_T		0x40
#define CH343_L_P_S     0x38
#define CH343_L_P_M     0x28
#define CH343_L_P_E     0x18
#define CH343_L_P_O     0x08
#define CH343_L_SB		0x04
#define CH343_L_C8      0x03
#define CH343_L_C7      0x02
#define CH343_L_C6      0x01
#define CH343_L_C5      0x00

#define CH343_N_B     	0x80
#define CH343_N_AB  	0x10

/*
 * Internal driver structures.
 */

/*
 * The only reason to have several buffers is to accommodate assumptions
 * in line disciplines. They ask for empty space amount, receive our URB size,
 * and proceed to issue several 1-character writes, assuming they will fit.
 * The very first write takes a complete URB. Fortunately, this only happens
 * when processing onlcr, so we only need 2 buffers. These values must be
 * powers of 2.
 */
#define CH343_NW  16
#define CH343_NR  16

struct ch343_wb {
	unsigned char *buf;
	dma_addr_t dmah;
	int len;
	int use;
	struct urb *urb;
	struct ch343 *instance;
};

struct ch343_rb {
	int	size;
	unsigned char *base;
	dma_addr_t dma;
	int	index;
	struct ch343 *instance;
};

struct usb_ch343_line_coding {
	__u32 dwDTERate;
	__u8 bCharFormat;
#define USB_CH343_1_STOP_BITS			0
#define USB_CH343_1_5_STOP_BITS			1
#define USB_CH343_2_STOP_BITS			2

	__u8 bParityType;
#define USB_CH343_NO_PARITY				0
#define USB_CH343_ODD_PARITY			1
#define USB_CH343_EVEN_PARITY			2
#define USB_CH343_MARK_PARITY			3
#define USB_CH343_SPACE_PARITY			4

	__u8 bDataBits;
} __attribute__ ((packed));

typedef enum {
	CHIP_CH342F = 0x00,
	CHIP_CH342GJK,
	CHIP_CH343GP,
	CHIP_CH343G_AUTOBAUD,
	CHIP_CH343K,
	CHIP_CH343J,
	CHIP_CH344L,
	CHIP_CH9101UH,
	CHIP_CH9102F,
	CHIP_CH9102X,
	CHIP_CH9103M,
} CHIPTYPE;

struct ch343 {
	struct usb_device *dev;				/* the corresponding usb device */
	struct usb_interface *control;			/* control interface */
	struct usb_interface *data;			/* data interface */
	struct tty_port port;			 	/* our tty port data */
	struct urb *ctrlurb;				/* urbs */
	u8 *ctrl_buffer;				/* buffers of urbs */
	dma_addr_t ctrl_dma;				/* dma handles of buffers */
	struct ch343_wb wb[CH343_NW];
	unsigned long read_urbs_free;
	struct urb *read_urbs[CH343_NR];
	struct ch343_rb read_buffers[CH343_NR];
	int rx_buflimit;
	int rx_endpoint;
	spinlock_t read_lock;
	int write_used;					/* number of non-empty write buffers */
	int transmitting;
	spinlock_t write_lock;
	struct mutex mutex;
	bool disconnected;
	struct usb_ch343_line_coding line;		/* bits, stop, parity */
	struct work_struct work;			/* work queue entry for line discipline waking up */
	unsigned int ctrlin;				/* input control lines (DCD, DSR, RI, break, overruns) */
	unsigned int ctrlout;				/* output control lines (DTR, RTS) */
	struct async_icount iocount;			/* counters for control line changes */
	struct async_icount oldcount;			/* for comparison of counter */
	wait_queue_head_t wioctl;			/* for ioctl */
	unsigned int writesize;				/* max packet size for the output bulk endpoint */
	unsigned int readsize,ctrlsize;			/* buffer sizes for freeing */
	unsigned int minor;				/* ch343 minor number */
	unsigned char clocal;				/* termios CLOCAL */
	unsigned int susp_count;			/* number of suspended interfaces */
	u8 bInterval;
	struct usb_anchor delayed;			/* writes queued for a device about to be woken */
	unsigned long quirks;
	u8 iface;
	CHIPTYPE chiptype;
	u16 idVendor;
	u16 idProduct;
	u8 gpio5dir;
};

#define CDC_DATA_INTERFACE_TYPE	0x0a

/* constants describing various quirks and errors */
#define NO_UNION_NORMAL				BIT(0)
#define SINGLE_RX_URB				BIT(1)
#define NO_CAP_LINE					BIT(2)
#define NO_DATA_INTERFACE			BIT(4)
#define IGNORE_DEVICE				BIT(5)
#define QUIRK_CONTROL_LINE_STATE	BIT(6)
#define CLEAR_HALT_CONDITIONS		BIT(7)

#endif
